My E430 4Matic's windshield washers are not working. How do you remove the nozzle assembly from the underside of the hood (bonnet)? How do you replace it? How do you remove the nozzles from the assembly? I'm hoping to avoid what the dealer says would cost hundreds of dollars! I'd be grateful for any advice.

What did the dealer say the problem is? See if the pump still works and if so then check for loose or leaking hoses. There is also a possibility that the nozzles are clogged and you can clear those with a safety pin or something similar. Or maybe it's the switch in the stalk. Then again it might be a fuse/relay.

Thank you for your reply. The dealer said he thought it was clogged nozzles, and I tried a single thin stiff wire from a wire brush in the openings of the nozzles. The wire went in alomst 1cm, and I moved it in and out in hopes of scrubing the interior of the nozzles. The wire might have been too thin, it was much smaller than the diameter of the openings. There was no change after using the wire.

One of the nozzle units squirts feebly and the other has good flow, but comes flowing out from somewhere in the nozzle unit, but not through the nozzle openings.

The dealer said that the parts are $50 each, so if I replaced them myself, I'd save the labor charge, which apparently is over $100.

Is it difficult to remove and replace the nozzle units? How do you do it? Do you need special tools?

My E430 4Matic's windshield washers are not working. How do you remove the nozzle assembly from the underside of the hood (bonnet)? How do you replace it? How do you remove the nozzles from the assembly? I'm hoping to avoid what the dealer says would cost hundreds of dollars! I'd be grateful for any advice.

Just because water does not come squirting out---------how do you automatically know that both nozzles went bad, at the same time!! That is a leap of faith. Then to add insult to injury you go and get a sharp pin or some other Chinese knock off tool, insert the tool and puncture the squirter diaphragm and ruin a 32 dollar part.

Why not first disconnect one of the nozzles and press the switch----does water come out of the hose-------then do the same on the other side. What happens??? Ding How!!